1276620444 has 144 divisors (see below), whose sum is σ = 3668202720. Its totient is φ = 370944000.

The previous prime is 1276620407. The next prime is 1276620461. The reversal of 1276620444 is 4440266721.

1276620444 is a `hidden beast` number, since 1 + 27 + 6 + 620 + 4 + 4 + 4 = 666.

1276620444 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1276620399 and 1276620408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 989752 + ... + 991040.

It is an arithmetic number, because the mean of its divisors is an integer number (25473630).

Almost surely, 2^1276620444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276620444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1834101360).

1276620444 is an abundant number, since it is smaller than the sum of its proper divisors (2391582276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1276620444 is a wasteful number, since it uses less digits than its factorization.

1276620444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1407 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 1276620444 is about 35729.8256922700. The cubic root of 1276620444 is about 1084.8106287463.

The spelling of 1276620444 in words is "one billion, two hundred seventy-six million, six hundred twenty thousand, four hundred forty-four".